Former Premier League striker Chris Sutton says he "does not know what West Ham are" after the club's difficult start to the season under Julen Lopetegui.
West Ham are 14th in the Premier League with just 11 points from their opening 10 matches.
Sutton says Lopetegui, who succeeded David Moyes at the end of last season, could be under "major pressure" if results do not improve soon.
"West Ham this season are stuck between the devil and the deep blue sea, you don't know what they are and that's the issue," Sutton told the Monday Night Club on BBC Radio 5 Live.
"It looks like he's a little bit stuck. He's in the wrong movie."
After claiming what seemed like a statement win against Manchester United the previous week, West Ham suffered a 3-0 defeat by Nottingham Forest on Saturday - their fifth loss of the season.
The club's only other league victories this season came against strugglers Ipswich Town and Crystal Palace.
"He needs time, but you don't really know what they are and he's spent a fortune," Sutton added.
